Java tutorial
/* * Copyright 2012 The Netty Project * * The Netty Project licenses this file to you under the Apache License, * version 2.0 (the "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. */ package io.netty.handler.codec.base64; import io.netty.buffer.ByteBuf; import io.netty.channel.ChannelHandler.Sharable; import io.netty.channel.ChannelHandlerContext; import io.netty.channel.ChannelPipeline; import io.netty.handler.codec.DelimiterBasedFrameDecoder; import io.netty.handler.codec.Delimiters; import io.netty.handler.codec.MessageToMessageEncoder; import io.netty.util.internal.ObjectUtil; import java.util.List; /** * Encodes a {@link ByteBuf} into a Base64-encoded {@link ByteBuf}. * A typical setup for TCP/IP would be: * <pre> * {@link ChannelPipeline} pipeline = ...; * * // Decoders * pipeline.addLast("frameDecoder", new {@link DelimiterBasedFrameDecoder}(80, {@link Delimiters#nulDelimiter()})); * pipeline.addLast("base64Decoder", new {@link Base64Decoder}()); * * // Encoder * pipeline.addLast("base64Encoder", new {@link Base64Encoder}()); * </pre> */ @Sharable public class Base64Encoder extends MessageToMessageEncoder<ByteBuf> { private final boolean breakLines; private final Base64Dialect dialect; public Base64Encoder() { this(true); } public Base64Encoder(boolean breakLines) { this(breakLines, Base64Dialect.STANDARD); } public Base64Encoder(boolean breakLines, Base64Dialect dialect) { this.dialect = ObjectUtil.checkNotNull(dialect, "dialect"); this.breakLines = breakLines; } @Override protected void encode(ChannelHandlerContext ctx, ByteBuf msg, List<Object> out) throws Exception { out.add(Base64.encode(msg, msg.readerIndex(), msg.readableBytes(), breakLines, dialect)); } }